Refrigerated fan guard



June 21, 1949. N. G. KELLER EI'AL 7 0 7 REFRIGERATED FAN GUARD FiledJuly 50, 1946 2 Sheets-Sheet 1 mmvroas: 2 v #54415 G/fELLEe BYW/LL/fl/V.1 #511512.

June 21, 1949. N. G. KELLER ETALY 2,474,109

' REFRIGERATED mm GUARD Filed July 30, 1946 '2'Sheets-Sheet 2 INVENIORS/WELL/E 6 Kali EVE.

BW/MLMM Ji 44%.

Patented June 21, 1949 UNITED STATES PATENT bodying the features of theinvention.

OFFICE REFRIGERATED FAN GUARD Nellie G. Keller and William J. Keller,St. Louis, Mo.

Application July 30, 1946, Serial No. 687,084 1 Claim. (01. 257259) Thisinvention relates to electric fan guards, 'Fig. 2 is a sectional viewtaken on line 2-2 and, more particularly to a refrigerated fan ofFig. 1. guard. Fig. 3 is a rear elevation of the fan guard.

An object of the invention is to provide a re- Fi 4 is a side elevationof he f n ar frigerated fan guard embodying an evaporator of 5 Referringto the drawings, the fan blade guard a type wherein a continuouscirculation, in a consists of a skeleton wire guard structure dessinuouspath, can be maintained by using a liquid ignated, generally as A, andan evaporator des-' refrigerant. ignated, generally as B.

A further object of the invention is to provide The skeleton wirestructure A in the embodian electric fan guard with an evaporator in,which m n h w pri s a p i y f spaced heat from a continuous passing flowof air therecentrically arran ed front W r rings I, 2 and for is chilledas it passes over and around the 3. a plurali y of sp e concentrically rn evaporator so that the temperature of the air r ar wir rings 4. 5 and6, which ar spa a sui delivered by the fan blades will be reduced overble di anc o he rear of the rin s 2 and the customary method of coolingwithafan with- 16 3. A plura i y o Wire members including a cut anevaporator forming a part of the guard straight front section 1 having acur ed Out r structure. end section 8, serve as connecting bracesbetween According to the present invention, the evapthe fron n s I. Zand 3 and the rear Oute orator is an independent unit supported 'by a nh rings I, 2 a 3 a s y Secured skeleton wire fan guard providing therebya cir- 20 to the section 1 and the ring 6 is suitably secured culatorysystem in a fan created air flow and to the free end of the curvedsection 8 by means within the bounds of the outside diameter of such,for instance, as solder, or spot welding. A the fan guard. suitable wirering 9, which forms the outer diam- A further object of the invention isto provide eter of the skeleton guard, connects the curved an evaporatorunit formed of tubing and desections 8 at the highest points thereof,and the signed to include a plurality of spaced sections, ring 9 issecured to the curved sections 8 by varying in length, connected by endbends, and means such, for instance, as solder, or spot weldhaving ageneral circular formation in front ing to further reinforce andstrengthen the skelelevation. eton guard structure. A plurality ofsuitable A further object of the invention is to provide V-shaped wiremembers l0 having a loop, or a fan blade guard for electric fans with anfastener receiving eye II are secured to the rear evaporator, or coolingunit in which a liquified rings 4, 5 and 6- The memb rs 0 ar i lyrefrigerant is permitted to vaporize, and which s cured to t e ea ngs 4,5 a d 6 y means can be connected with either an absorption re- Such, forinstance, as solder, or spot e d frigeration apparatus, or arefrigerating unit em- 86 h membe s l a adapted to be Secured t0 ployinga compressor, so that the flow f air an electric fan motor I: by meansof suitable currents delivered by the fan blades will be fa rs l3osupport the skeleton guard in D hi1] d sition relative to the motor andto the fan blades A further object of t invention is t 13 0- H which arehoused within the guard structure d an arrangement of a fan bl d guardfor 40 and driven by the motor for delivering a continuelectric fans andan evaporator, or cooling unit, 0118 flow of a y from the wherein arefrigerant is permitted to vaporize, he evapo ator desi na ed, gene aly asB comand where the expansion of the refrigerant vapor prises a. sinle tub p p conduit, and, in 1Zhe absorbs heat from passing air to reducethe temdim Shown. includes a plurality of suitperature of air currentsdelivered by the fan ably spac d strai h ri n al o s r un blades. I! ofvarious lengths on opposite sides of the With the above objects in view,together with horizontal center line of the evaporator. The such otherobjects and advantages as may subsections I! are connected at their endsby curved sequently appear, the invention resides in the bends ii, theouter ends of which are confined t and n th mbin tion, construction andwithin the bounds of the outside diameter of the arrangement of theparts hereinafter described skeleton guard A so that the evaporato Wpand claimed. and illustrated by way of exampear as of round or circularoutline in front and ple in the accompanying drawings, in which: rearelevation. .One of the end sections of the Fig. 1 is a front elevationof a fan guard emevaporator is preferably bent, as at IT, provid 4 ingthereby a rearwardly projecting section It suitable refrigerationapparatus, not shown, and the of the evaporator is bent, as at 19,providing thereby a rearwardly projecting section 20 for connection withthe refrigeration apparatus. The refrigerant employed is introduced intoone end. or the other of the evaporator from the refrigeration apparatusand permitted to vaporize in the sinuous circulatory path through theevaporator where the expansion of the refrigerant vapor will absorb heatfrom passing air delivered by the fan blades and thereby chill, cool, orin other words reduce the temperatureof the air delivered past theevaporator by means of the fan blades. The evaporator -is showna'sdished due to curved bendportions being curvedrearwardly, as at 2|.From the foregoing description, it will be ape parent refrigerated airwill pass from the evaporator and be carried therefrom into the room infront of the. fan.

The many advantages of the herein described invention will be apparentto those skilled in the art to which it appertains.

what we claim is:

An evaporator cofl adapted to bemounted upon and fixed to the front faceof an electric fan guard, said coil comprising a single length of tubingformed to provide spaced straight horizontal runs of various lengths onopposite sides of the horizontal centerline of the evaporator, said runsconnected at their ends bycurved bends, and the horizontal runs adjacentthe curved bends beins curved rearwardly to arrange the curved bends tolie in a circular outline to the rear of the spaced straight horizontalruns.

NELLIE G. KEILER.

WILLIAM J. KELLER.

REFERENCES CITED The following rei'erenices are of record in the flle ofthis patent: I

UNITED STATES PATENTS Gardes Nov. 26, 1946

